1997-2009年我国9省区18~49岁成年居民身体活动状况及变化趋势研究
1997-2009년아국9성구18~49세성년거민신체활동상황급변화추세연구
Study on status and trend of physical activity among Chinese adults aged 18-49 years old in 9 provinces from 1997 to 2009
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